I have some questions about the SYS boards and PSX (B747-400 simulator) interfacing. I know the software is not available now but the release is scheduled for very soon (August).

First, are the SYS boards (hardware part) already compatible with this software ?

Second, is the InterfaceIT software already compatible and if not, will an update be delivered in a reasonable delay after PSX release ?

Third and last question, what about the indicator LEDs dimming with the SYS boards ? I know that PSX will make possible to dim the Korry's LEDs accordingly to the IND LTS switch position (BRT, DIM or TEST) located on the overhead. Are the SYS boards able to render this feature ?

First, the SYS board hardware interfaces fine with PSX. There are no modifications necessary for the hardware to recognize that a switch has been thrown or a light needs to be lit.

Second, the interfaceIT derivative being developed for PSX provides the linkage to PSX and that effort is still in development. Most of my sim has already been interfaced and works fine, there are just a few additional conditions that need to be enabled. It is anticipated that that effort will be completed this month.

Third, the indicator light test. The capability to dim the LEDs is not enabled.

Thank you Jon. For now, to simulate the BRT - DIM feature, I think about adding a relay on the LEDs chanel in order to switch between the normal 20mA out of the SYS board and an additional resistor to get a lower current in the LEDs. It would be fine to get the LEDs driven by PSX directly (abnormal situations, ...)

Peter, Steve, I don't know how the SYS board LEDs chanel is built (multiplexed PWM ?) but do you think this feature could be enabled easily and is it reasonable to think it could be ?

I understand it is not possible to change all the production line only for 747 builders and PSX users. Just an idea, but the PWM is very flexible for output voltage management. I don't know how this management is done on the SYS boards, but maybe it may only need a software modification.